From 2b0ac8db17bee1e6f48a5a25680a73b3bb6ee144 Mon Sep 17 00:00:00 2001
From: Thomas Coopman <thomas.coopman@gmail.com>
Date: Tue, 16 Aug 2022 10:47:47 +0200
Subject: [PATCH] fix for #1588

---
 assets/js/search-page.js | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/assets/js/search-page.js b/assets/js/search-page.js
index b4b12abe4..3871ff0a0 100644
--- a/assets/js/search-page.js
+++ b/assets/js/search-page.js
@@ -83,13 +83,16 @@ function indexStorageKey () {
   return `index:${getProjectNameAndVersion()}`
 }
 
-function createIndex () {
+export function createIndex () {
+  lunr.QueryLexer.termSeparator = /\s+/
   return lunr(function () {
+    this.tokenizer.separator = /\s+/
     this.ref('ref')
     this.field('title', { boost: 3 })
     this.field('doc')
     this.metadataWhitelist = ['position']
     this.pipeline.remove(lunr.stopWordFilter)
+    this.use(hyphenSearchPipeline)
     this.use(elixirTokenSplitter)
     this.pipeline.remove(lunr.trimmer)
     this.use(elixirTrimmer)
@@ -100,6 +103,28 @@ function createIndex () {
   })
 }
 
+function hyphenSearchPipeline (builder) {
+  var pipelineFunction = function (token) {
+    var tokenStr = token.toString()
+    if (tokenStr.indexOf('-') < 0) return token
+
+    let tokens = []
+
+    tokens.push(
+      token.clone(function (s) {
+        return s.replace('-', '')
+      })
+    )
+
+    tokens.push(token)
+    return tokens
+  }
+
+  lunr.Pipeline.registerFunction(pipelineFunction, 'customPipeline')
+  builder.pipeline.before(lunr.stemmer, pipelineFunction)
+  builder.searchPipeline.before(lunr.stemmer, pipelineFunction)
+}
+
 function elixirTokenSplitter (builder) {
   registerElixirTokenFunction()
   builder.pipeline.before(lunr.stemmer, elixirTokenFunction)